Yes. Did you run NBI again when you updated to 10.6.2 (as is required)? If so, that is what did it. NBI installs Chameleon in a way that renders Windows unbootable. I have posted a fix elsewhere in this forum that prevents that from happening. As it is, you need to run the Windows 7 repair using the steps in this guide
, beginning with this one "- Insert Seven's DVD and go to Prompt in the "repair my computer" section." Those instructions are a little unclear, but you have to hold Shift+Fn+F10 to open the command prompt windows once you get to the installer screen that says "Repair my computer."
[EDIT - Actually, the guide here
(beginning with phase 6, step 6) may be a little more clear all around.]